Improvement in machines for upsetting tires



.or use of a clamp and bed bed-plate and The object of the invention is to lobtain a plate A, the tire,

UNIT-ED STATES P A'rinwr'I OFFICE..

-`Territ M. BRAHN', v0E. RED BANK, NEW JERSEY.

spetificnon forming part of Lei'iere'rstent'No.36,501,dma september 23, 1ste.

To all'whom, it may concern: Beit known that I, JOHN M. BRAHN,

'.Red Bank, in the county of Monmouth and State of New J ersey,

have invented ai new andv Improved Devicefo'r Shrinking or Upsetting Tires/ for the'. Wheels ofv Vehicles; andv I` .do hereby declarethat the following is a full, clear,` and exact description of' the same, reference being had to; the accompanying drawings, makinga part of this specification, in which- Figure l is afront view of my invention;-`

in Fig. 1, and' said bar isv constructed `of Fig. 2, a plan or top view ofthe same.

Similar letters of vreference' indicate correspending parts in the two figures.'

' .This invention consists in the employment -plate arrangedin such a manner that the heated portion of the tire may byasinglemanipulation befirmly secured in position over the bed-plate, so; Ithat the former may be hammered down upon the contracted as desired.

simple, efiicient, and economical device for the purposespecilied-one that may be con s tructed and operated -by any ordinary blacksmith, or one not an expert o r overskilled in the art. l

`To enable those skilled in thev art'to fully understand and construct my invention, I will .proceed to describe it.

A represents a plate of wrought-iron, which may be of rectangular form and of any suitable dimensions. This platelias two parallel recesses or slots, a a, made in it transversely and .extending from its'front edgeinward to a line about at its center, as'shown in Fig; 2.

The plate A is secured firmly to the front edge of a bench orany proper support, the ont edge of the platebeing flush with the front edge of the bench, and in 'the front edge of the latter there are made two oblique slots,

b b, having such an inclination that they may receive the tire B. This will be fully u nderstood by referring to Fig. 1, in which the bench is shown in red outline. The slots b b are in line with the recesses or slots q, e in the whenadjusted in the device, fitting inthe latter as well as in the former.

The portionCof the bed-platebetween the recesses or slots a a has a pendent rod, D, at-` tached, on -the-lowerV part of which a screw, c,

iscut to receive -a en'ut, E.w'l1'ich Amay befinf the form-of a 'wheel and of suicient diameter to enablethe operator to have a requisite purchase or leverage power to work the device with facility. j

F is an upright semicrcnlar bar, through thelower part of which the rod D passes,the nut 4E being below it, This bar F has a bar, d, attached to itnearits ends, which serves as a stay for the same, the rod-D passing through outer edges of vthe recesses or slotsa a, as shown wronghtiron.

operated -uponis heated at the proper or delet .down the semi ci rcnlar b ar F sufficiently far to admit of the tire B being adjusted laterally Slots a a of the the bedplate.' The operator then screws up the nut E, and thereby raises the s elnicircnlar bar Funtil the tire B at each side of the heated per edges of the semicircnlar bar F and the ,outer edges of the recesses or slots a a. 'The heated portion ax is then `hammered down on the part O of the course, being equal to th'edierence in vlength between the. part tened and said part after it is flattened'. After' down orunscrewed,so as to let down the semicircular bar F and lrelease the tire, which 1s then removed from the device andthe attened Vpart ax cnrvedngain liyafew blows of the hammer, so that it will correspond with the rest of the eurvatu re of is completed.

AIn order' to varythe degree of contraction in difterenttires, the part ax less cnrvedor bent with the being adjustedinthe device. Thegre'ate'r the curvature injsaid part, of course the greater will be the contraction.

This device', although comparatively simple facility than many of the more pretentious mabemade by' anyordi nary Ablacksmith and op it. The ends of the bar F are underneath the r[he operation' is vas follows: The tire to be sired point and the nut Eis turned so as to inthe slots b b of the bench andthe recesses or plate A, the heated portion a of the. tire being vdirectlyoverl the part C of portion ac is firmly clamped between the upplate A; and vis'co'nsequently- 'cont racted"-`or shrunk, the'contraction, of

aX before the same .is liat-` f this operation is performed thc nutE is turned the tire, and the work may he more or hammer. before and inexpensive, may be operated with greater erated by an apprent'ce or ordinary hand With- F, .screw-rod D,V and nut Eo1` am' equivalent; out any difficulty Whatever and the Work per^- means to operate said bar, as and for the plu'- formed in a proper maner. pose herein set forth.

Having thus described my imzention, what-I clan as new, auddesire to secure by Letters Patent, isv' f JOHN BRAHN.

Vitnesses:

The bed-plate A, provided with paurallel re- ROBERT B. HAYWARD7V casses or slots a a, in combination with the bm?l FRANCIS H. LITTLE. 

